The punchline.
Two. One to screw it almost all the way in and one to give it a surprising twist at the end.
if you don't nail them right, they'll end up at your neighbor's.
If she's only wearing one sock. (This joke brought to you courtesy the homeless guy outside my local 7-11.) Edit: tweaked the punchline.
There's no punchline.
Liver alone, cheese mine!
Because they can't even